Wi Cheonsang is the young and fabulously rich head of the Sanpyeong Merchant Group, who built a vast trading house at a startlingly early age. In public he is bright and generous, and he is courted as a brilliant match for Tang Soran. But Han Seojin, who knows the novel in advance, sees him otherwise: beneath the guise of a successful merchant hides a rotten-to-the-core spy of the Demonic Cult, a lackey of Baek Sahyeon.
Wi Cheonsang turns up among the suitors gathered for Tang Soran's marriage viewing and gives her an elegant hairpin as a token of courtship. Outwardly he is a flawless match, but Han Seojin knows the truth: should the Tang Clan bind itself to Wi Cheonsang, it would be left defenceless before Baek Sahyeon, whose follower and lackey the merchant serves as.
